http://bugs.winehq.org/show_bug.cgi?id=26410
--- Comment #3 from Michal Suchanek hramrach@centrum.cz 2011-03-16 16:48:12 CDT --- XVidMode probably should not be used at all on screens with XRandr support.
Either the XVidMode extension is broken or it is used incorrectly in Wine (and the X utilities).